Preparation method of mixed crystal phase heterojunction nano-cadmium sulfide with special morphology

A mixed crystal and cadmium sulfide technology, applied in the field of nanomaterials, can solve the problems of low catalytic properties, easy agglomeration, and unsatisfactory catalytic efficiency of synthetic products.

Active Publication Date: 2017-09-08
QUFU NORMAL UNIV
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Problems solved by technology

From the perspective of the prior art, in the preparation process, some need to add organic coating reagents; some synthesis steps are cumbersome; some synthesis products have unsatisfactory catalytic efficiency
The study also found that t

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  • Preparation method of mixed crystal phase heterojunction nano-cadmium sulfide with special morphology
  • Preparation method of mixed crystal phase heterojunction nano-cadmium sulfide with special morphology
  • Preparation method of mixed crystal phase heterojunction nano-cadmium sulfide with special morphology

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Embodiment Construction

[0012] Technical scheme of the present invention is as follows:

[0013] A method for preparing nano cadmium sulfide with mixed crystal phase heterojunction with special morphology, comprising the following steps:

[0014] (1) Dissolve cadmium nitrate in absolute ethanol to form a cadmium nitrate ethanol solution; dissolve lithium hydroxide in secondary distilled water to form a lithium hydroxide solution; under stirring conditions, add the lithium hydroxide solution dropwise to nitric acid In the cadmium ethanol solution, a uniform mixed solution is formed, continue to stir for 60 minutes, then stand at 26-29°C for 5-6h, transfer to the reaction kettle, and react at 180-200°C for 10-12h; the obtained product is washed , drying to obtain a cadmium hydroxide precursor; placing the prepared cadmium hydroxide precursor in a muffle furnace, and roasting at 280-300° C. for 1.5-2 hours to obtain nano-cadmium oxide;

[0015] (2) Take the prepared nano-cadmium oxide and add it to the...

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Abstract

The invention relates to a preparation method of mixed crystal phase heterojunction nano-cadmium sulfide with a special morphology. The preparation method comprises the following steps: preparing a precursor cadmium hydroxide by a solvothermal method; obtaining nano-cadmium oxide by calcination; then, vulcanizing the prepared nano-cadmium oxide by a hydrothermal method to synthesize nano-cadmium sulfide of a cubic-hexagonal mixed crystal phase; and washing and drying the product to obtain the mixed crystal phase heterojunction nano-cadmium sulfide, wherein the morphology characteristics are shown as cadmium sulfide nano-particles with particle size of 20-50 nm and cadmium sulfide nano-rods with length of 60-120 nm and diameter of 10-25 nm. The obtained mixed crystal phase heterojunction nano-cadmium sulfide is used as a photocatalyst for degrading potassium dichromate solution and has excellent photocatalytic degradation performance.

Description

technical field [0001] The invention relates to a preparation method of nano cadmium sulfide with special morphology mixed crystal phase heterojunction with high catalytic performance and belongs to the technical field of nanometer materials. Background technique [0002] In recent years, heterojunction photocatalysts have attracted much attention due to their excellent catalytic properties in the process of photolysis of water for hydrogen production and degradation of organic pollutants. Recently, a new type of heterojunction, that is, a mixed-phase heterojunction formed by two different crystal phases of a semiconductor material, has been discovered. This special heterojunction structure can promote the effective transport of electrons and holes generated by photoexcitation in the desired direction, promote charge separation and prolong the lifetime of carriers, thus exhibiting excellent photocatalytic performance. [0003] Cadmium sulfide is an important II-VI semicondu...

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Application Information

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IPC IPC(8): B01J27/04B01J35/02C02F1/30C02F101/30
Inventor 景志红凌宝萍于洋
Owner QUFU NORMAL UNIV
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